Please don’t try and interpret his thoughts regarding the ring and how and when he might present it to you.
Maybe he’s unsure how to proceed. You’ve said to him that you don’t want to get married so he can’t really “propose” to you.
Maybe he’s confused why you gave it to him when it was received. Maybe he thinks that means you don’t want to wear it as yet?
Does he just get it out and push it across the table to you at breakfast? Does he wait until a significant date - your birthday, Christmas, Anniversary of meeting, after divorce finalised, while on a trip ????
So talk to him, keep it light, just say “really looking forward to wearing my fabulous ring, will I have to wait long?
If it was me, I’d just get it out of the drawer and wear it. Life’s too short!